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Furthermore, since there is no once-per-turn restriction, as long as this card is face-up, you can ignore costs as many times as you like

If the total Levels of monsters used for this card's Ritual Summon were 2 or less: You can destroy all Spells and Traps your opponent controls

When properly Synchro Summoned, Black Rose Dragon destroys every card on the field

Offensively, you'd need to get Purrely Delicious Memory or Purrely Happy Memory attached as materials

This is fundamentally different from traditional sidedecking tactics, and it has its own risks and benefits

But both decks have their own strengths and weaknesses worth considering